10223 + Interview Questions in Chemistry Page 169 InterviewSolution

8401.	The charge on an electron is 4.8 × 10-10 esu. What is the value of charge in Li+ ion
Answer» The charge on an electron is 4.8 × 10^-10 esu. What is the value of charge in Li⁺ ion

Discussion

8402.	The part of the earth's surface that contains water is called:
Answer» The part of the earth's surface that contains water is called:

Discussion

8403.	When is the reaction of iodine and phosphorus explosive?
Answer» When is the reaction of iodine and phosphorus explosive?

Discussion

8404.	When MnO2 is fused with KOH, a coloured compound is formed. The product and its colour is
Answer» When $M n O_{2}$ is fused with KOH, a coloured compound is formed. The product and its colour is

Discussion

8405.	Question 111 An atom changes to a charged particle called ion, if it loses or gains electrons. The charge on an ion is the charge on electrons plus charge on protons. Now, write the missing information in the table given below : Name of ionProton chargeElectron chargeIon charge(a) Hydroxide ion+9−−1(b) Sodium ion+11−+1(c) Aluminium ion+13−10−(d) Oxide ion+8−10−
Answer» Question 111 An atom changes to a charged particle called ion, if it loses or gains electrons. The charge on an ion is the charge on electrons plus charge on protons. Now, write the missing information in the table given below : $\begin{matrix} Name of ion & Proton charge & Electron charge & Ion charge (a) Hydroxide ion & + 9 & - & - 1 (b) Sodium ion & + 11 & - & + 1 (c) Aluminium ion & + 13 & - 10 & - (d) Oxide ion & + 8 & - 10 & - \end{matrix}$

8405.

Question 111 An atom changes to a charged particle called ion, if it loses or gains electrons. The charge on an ion is the charge on electrons plus charge on protons. Now, write the missing information in the table given below : Name of ionProton chargeElectron chargeIon charge(a) Hydroxide ion+9−−1(b) Sodium ion+11−+1(c) Aluminium ion+13−10−(d) Oxide ion+8−10−

Answer»

Question 111

An atom changes to a charged particle called ion, if it loses or gains electrons. The charge on an ion is the charge on electrons plus charge on protons. Now, write the missing information in the table given below :
$\begin{matrix} Name of ion & Proton charge & Electron charge & Ion charge (a) Hydroxide ion & + 9 & - & - 1 (b) Sodium ion & + 11 & - & + 1 (c) Aluminium ion & + 13 & - 10 & - (d) Oxide ion & + 8 & - 10 & - \end{matrix}$

Discussion

8406.	The radius of proton is 10-15 metre . Express it in Nanometre.
Answer» The radius of proton is 10^-15_{^{metre . Express it in Nanometre.}}

Discussion

8407.	What are drying or desiccating agents. Give examples.
Answer» What are drying or desiccating agents. Give examples.

Discussion

8408.	A solution has been prepared by dissolving 5g of urea in 95g of water. What is the mass percent of urea in the solution ?
Answer» A solution has been prepared by dissolving 5g of urea in 95g of water. What is the mass percent of urea in the solution ?

Discussion

8409.	Sir/ma'am I wanted to ask that we can get the smell of the gaseous type of perfumes/sprays like(AXE) several metres away. Then what about the liquid type of perfumes like fogg how we are able to smell them several metres away.
Answer» Sir/ma'am I wanted to ask that we can get the smell of the gaseous type of perfumes/sprays like(AXE) several metres away. Then what about the liquid type of perfumes like fogg how we are able to smell them several metres away.

8409.

Sir/ma'am I wanted to ask that we can get the smell of the gaseous type of perfumes/sprays like(AXE) several metres away. Then what about the liquid type of perfumes like fogg how we are able to smell them several metres away.

Answer»

Sir/ma'am

I wanted to ask that we can get the smell of the gaseous type of perfumes/sprays like(AXE) several metres away. Then what about the liquid type of perfumes like fogg how we are able to smell them several metres away.

Discussion

8410.	Is the pure milk that you get is really pure? Justify
Answer» Is the pure milk that you get is really pure? Justify

Discussion

8411.	If 100kg of a water sample contains 6 g of MgSO4. The degree of hardness of the water sample is
Answer» If 100kg of a water sample contains 6 g of $M g S O_{4}$ . The degree of hardness of the water sample is

Discussion

8412.	Among the following a natural polymer is [MP PET 1993; BCECE 2005]
Answer» Among the following a natural polymer is [MP PET 1993; BCECE 2005]

Discussion

8413.	Which of the following best describes Brownian motion?
Answer» Which of the following best describes Brownian motion?

Discussion

8414.	Question 1 What are canal rays?
Answer» Question 1 What are canal rays?

Discussion

8415.	Calculate milli-moles and moles of a solute in 2000 mL solution which is 1 M.
Answer» Calculate milli-moles and moles of a solute in 2000 mL solution which is 1 M.

Discussion

8416.	Which amongst the following is the electron dot structure of H2 molecule?
Answer» Which amongst the following is the electron dot structure of $H_{2}$ molecule?

Discussion

8417.	Treatment of concentrated solution of borax with calculated quantity of sulphuric acid gives
Answer» Treatment of concentrated solution of borax with calculated quantity of sulphuric acid gives

Discussion

8418.	Question 19 Is it possible for the atom of an element to have one electron, one proton and no neutron? If so, name the element.
Answer» Question 19 Is it possible for the atom of an element to have one electron, one proton and no neutron? If so, name the element.

Discussion

8419.	The mass ratio of carbon to hydrogen in methane is 3:1. How much amount of hydrogen is required to react with 36 gms of carbon to form methane?
Answer» The mass ratio of carbon to hydrogen in methane is 3:1. How much amount of hydrogen is required to react with 36 gms of carbon to form methane?

Discussion

8420.	When heat is constantly supplied by a gas burner with a small flame to melt ice, then the temperature of ice during melting : (a) increases very slowly (b) does not increase at all (c) first remains constant and then increases (d) increases to form liquid water
Answer» When heat is constantly supplied by a gas burner with a small flame to melt ice, then the temperature of ice during melting : (a) increases very slowly (b) does not increase at all (c) first remains constant and then increases (d) increases to form liquid water

8420.

When heat is constantly supplied by a gas burner with a small flame to melt ice, then the temperature of ice during melting : (a) increases very slowly (b) does not increase at all (c) first remains constant and then increases (d) increases to form liquid water

Answer»

When heat is constantly supplied by a gas burner with a small flame to melt ice, then the temperature of ice during melting :

(a) increases very slowly (b) does not increase at all

(c) first remains constant and then increases (d) increases to form liquid water

Discussion

8421.	When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid . A as well as water. Moreover, products B and C cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water. (a) What type of change occurs when solid A is dissolved in water ? Why ? (b) What type of change occurs when solid D is dissolved in water ? Why ? (c) Name a metal which you think could behave like solid A . Also name the products B and C. (d) Name the solid D if it is the one which is used in making ordinary dry cells. (e) Name the process by which D can be recovered from E.
Answer» When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid . A as well as water. Moreover, products B and C cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water. (a) What type of change occurs when solid A is dissolved in water ? Why ? (b) What type of change occurs when solid D is dissolved in water ? Why ? (c) Name a metal which you think could behave like solid A . Also name the products B and C. (d) Name the solid D if it is the one which is used in making ordinary dry cells. (e) Name the process by which D can be recovered from E.

8421.

When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid . A as well as water. Moreover, products B and C cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water. (a) What type of change occurs when solid A is dissolved in water ? Why ? (b) What type of change occurs when solid D is dissolved in water ? Why ? (c) Name a metal which you think could behave like solid A . Also name the products B and C. (d) Name the solid D if it is the one which is used in making ordinary dry cells. (e) Name the process by which D can be recovered from E.

Answer»

When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid . A as well as water. Moreover, products B and C cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water.

(a) What type of change occurs when solid A is dissolved in water ? Why ?

(b) What type of change occurs when solid D is dissolved in water ? Why ?

(c) Name a metal which you think could behave like solid A . Also name the products B and C.

(d) Name the solid D if it is the one which is used in making ordinary dry cells.

(e) Name the process by which D can be recovered from E.

Discussion

8422.	Choose the type of fire which is caused due to acetylene.
Answer» Choose the type of fire which is caused due to acetylene.

8422.

Choose the type of fire which is caused due to acetylene.

Answer»

Choose the type of fire which is caused due to acetylene.

Discussion

8423.	A liquid compound X of molecular mass 18 u can be obtained from a number of natural sources. All the animals and plants need liquid X for their survival. When an electric current is passed through 200 grams of pure liquid X under suitable conditions, then 178 grams of gas Y and 22 grams of gas Z are produced. Gas Y is produced a the positive electrode whereas gas Z is obtained at the negative electrode. Moreover, gas Y supports combustion whereas gas Z burns itself causing explosions. (a) Name (i) liquid X (ii) gas Y, and (iii) gas Z. (b) What is the ratio of the mass of element Z to the mass of element Y in the liquid X ? (c) Which law of chemical combination is illustrated by this example? (d) Name two sources of liquid X. (e) State an important use of Y in our life.
Answer» A liquid compound X of molecular mass 18 u can be obtained from a number of natural sources. All the animals and plants need liquid X for their survival. When an electric current is passed through 200 grams of pure liquid X under suitable conditions, then 178 grams of gas Y and 22 grams of gas Z are produced. Gas Y is produced a the positive electrode whereas gas Z is obtained at the negative electrode. Moreover, gas Y supports combustion whereas gas Z burns itself causing explosions. (a) Name (i) liquid X (ii) gas Y, and (iii) gas Z. (b) What is the ratio of the mass of element Z to the mass of element Y in the liquid X ? (c) Which law of chemical combination is illustrated by this example? (d) Name two sources of liquid X. (e) State an important use of Y in our life.

Discussion

8424.	Deuterium is an isotope of hydrogen and is represented by 21H. How many deuterium atoms are present in heavy water?
Answer» Deuterium is an isotope of hydrogen and is represented by $_{1}^{2} H$ . How many deuterium atoms are present in heavy water?

Discussion

8425.	Which shell is occupied by the last electron of Neon?
Answer» Which shell is occupied by the last electron of Neon?

Discussion

8426.	The ionic compound containing Fe3+ and (SO4)2− would have the formula
Answer» The ionic compound containing ${F e}^{3 +}$ and $(S O_{4})^{2 -}$ would have the formula

Discussion

8427.	How did scientists calculate the mass of particles coming out in a chemical reaction ?
Answer» How did scientists calculate the mass of particles coming out in a chemical reaction ?

Discussion

8428.	The orbital with maximum energy is
Answer» The orbital with maximum energy is

Discussion

8429.	Question 5 Salt can be separated from its solution (salt dissolved in water) because (a) mixing of salt in water is a change that can be reversed by heating and melting of salt (b) mixing of salt in water is a change that cannot be reversed (c) mixing of salt in water is a permanent change (d) mixing of salt in water is a change that can be reversed by evaporation
Answer» Question 5 Salt can be separated from its solution (salt dissolved in water) because (a) mixing of salt in water is a change that can be reversed by heating and melting of salt (b) mixing of salt in water is a change that cannot be reversed (c) mixing of salt in water is a permanent change (d) mixing of salt in water is a change that can be reversed by evaporation

8429.

Question 5 Salt can be separated from its solution (salt dissolved in water) because (a) mixing of salt in water is a change that can be reversed by heating and melting of salt (b) mixing of salt in water is a change that cannot be reversed (c) mixing of salt in water is a permanent change (d) mixing of salt in water is a change that can be reversed by evaporation

Answer»

Question 5

Salt can be separated from its solution (salt dissolved in water) because
(a) mixing of salt in water is a change that can be reversed by heating and melting of salt
(b) mixing of salt in water is a change that cannot be reversed
(c) mixing of salt in water is a permanent change
(d) mixing of salt in water is a change that can be reversed by evaporation

Discussion

8430.	What did Rutherford conclude regarding the atomic mass? (i) Mass of the atom is uniformly distributed. (ii) Nucleus of an atom is much heavier than electron. (iii) Nearly all the mass of an atom resides at the centre of an atom. (iv) Nucleus of an atom is lighter than the electron.
Answer» What did Rutherford conclude regarding the atomic mass? (i) Mass of the atom is uniformly distributed. (ii) Nucleus of an atom is much heavier than electron. (iii) Nearly all the mass of an atom resides at the centre of an atom. (iv) Nucleus of an atom is lighter than the electron.

Discussion

8431.	What form of ice should be taken to determine it's melting point?
Answer» What form of ice should be taken to determine it's melting point?

Discussion

8432.	What is a bulk phenomenon in terms of boiling
Answer» What is a bulk phenomenon in terms of boiling

Discussion

8433.	Question 82 (iii) In her Science class, Jyoti learned that the atomic weight of Helium is 4.0030; of Hydrogen is 1.0080; and of Oxygen is 16.0000. Find the difference between the atomic weights: Helium and Hydrogen.
Answer» Question 82 (iii) In her Science class, Jyoti learned that the atomic weight of Helium is 4.0030; of Hydrogen is 1.0080; and of Oxygen is 16.0000. Find the difference between the atomic weights: Helium and Hydrogen.

8433.

Question 82 (iii) In her Science class, Jyoti learned that the atomic weight of Helium is 4.0030; of Hydrogen is 1.0080; and of Oxygen is 16.0000. Find the difference between the atomic weights: Helium and Hydrogen.

Answer»

Question 82 (iii)

In her Science class, Jyoti learned that the atomic weight of Helium is 4.0030; of Hydrogen is 1.0080; and of Oxygen is 16.0000. Find the difference between the atomic weights:

Helium and Hydrogen.

Discussion

8434.	Why is pumice stone placed usedin the beaker tofind the boiling point of water
Answer» Why is pumice stone placed usedin the beaker tofind the boiling point of water

8434.

Why is pumice stone placed usedin the beaker tofind the boiling point of water

Answer»

Why is pumice stone placed usedin the beaker

tofind the boiling point of water

Discussion

8435.	Which one of the following molecule exists as tetra-atomic molecule?
Answer» Which one of the following molecule exists as tetra-atomic molecule?

Discussion

8436.	What is the process to separate the mixture of ammonium chloride and sodium chloride ?
Answer» What is the process to separate the mixture of ammonium chloride and sodium chloride ?

Discussion

8437.	How will you separate common salt, sand and iron filings from their mixture?
Answer» How will you separate common salt, sand and iron filings from their mixture?

Discussion

8438.	What's is pauling's scale?
Answer» What's is pauling's scale?

Discussion

8439.	Name all the 118 elements in the periodic table with their symbol, atomic mass and atomic number.
Answer» Name all the 118 elements in the periodic table with their symbol, atomic mass and atomic number.

Discussion

8440.	You are suffering from fever. Which one will lower down your temperature ice or ice cold water. Explain
Answer» You are suffering from fever. Which one will lower down your temperature ice or ice cold water. Explain

Discussion

8441.	One of the following does not undergo sublimation. This one is: (a) iodine (b) sodium chloride (c) ammonium chloride (d) camphor
Answer» One of the following does not undergo sublimation. This one is: (a) iodine (b) sodium chloride (c) ammonium chloride (d) camphor

8441.

One of the following does not undergo sublimation. This one is: (a) iodine (b) sodium chloride (c) ammonium chloride (d) camphor

Answer»

One of the following does not undergo sublimation. This one is:

(a) iodine (b) sodium chloride (c) ammonium chloride (d) camphor

Discussion

8442.	Milk of magnesia turns _________________.
Answer» Milk of magnesia turns _________________.

Discussion

8443.	Nowadays In a chemical reaction we write reactions then an arrow and then the products.we don't write reactants=products even after balancing.why? The mass of the reactants is not = to mass of the products.why?
Answer» Nowadays In a chemical reaction we write reactions then an arrow and then the products.we don't write reactants=products even after balancing.why? The mass of the reactants is not = to mass of the products.why?

Discussion

8444.	On heating strongly, Lead (II) nitrate yields:
Answer» On heating strongly, Lead (II) nitrate yields:

Discussion

8445.	Is there is change of matter undergoing chemical cahnge
Answer» Is there is change of matter undergoing chemical cahnge

Discussion

8446.	Sir how to find the chemical formula for potssium dichromate
Answer» Sir how to find the chemical formula for potssium dichromate

Discussion

8447.	Which of the following reactions does not liberate gaseous product ?
Answer» Which of the following reactions does not liberate gaseous product ?

Discussion

8448.	A set is a collection of ___ objects.
Answer» A set is a collection of ___ objects.

Discussion

8449.	The given diagram represents the processes that take place when water changes states. The information in which alternative correctly matches the letters with their processes?
Answer» The given diagram represents the processes that take place when water changes states. The information in which alternative correctly matches the letters with their processes?

8449.

The given diagram represents the processes that take place when water changes states. The information in which alternative correctly matches the letters with their processes?

Answer»

The given diagram represents the processes that take place when water changes states.

The information in which alternative correctly matches the letters with their processes?

Discussion

8450.	If the dispersed phase is liquid and the dispersion medium is solid, then the colloid is known as:
Answer» If the dispersed phase is liquid and the dispersion medium is solid, then the colloid is known as:

Discussion

Explore topic-wise InterviewSolutions in .

The charge on an electron is 4.8 × 10-10 esu. What is the value of charge in Li+ ion

The part of the earth's surface that contains water is called:

When is the reaction of iodine and phosphorus explosive?

When MnO2 is fused with KOH, a coloured compound is formed. The product and its colour is

The radius of proton is 10-15 ​​​metre ​​​​​​​​​​​. Express it in Nanometre.

What are drying or desiccating agents. Give examples.

A solution has been prepared by dissolving 5g of urea in 95g of water. What is the mass percent of urea in the solution ?

Sir/ma'am I wanted to ask that we can get the smell of the gaseous type of perfumes/sprays like(AXE) several metres away. Then what about the liquid type of perfumes like fogg how we are able to smell them several metres away.

Is the pure milk that you get is really pure? Justify

If 100kg of a water sample contains 6 g of MgSO4. The degree of hardness of the water sample is

Among the following a natural polymer is [MP PET 1993; BCECE 2005]

Which of the following best describes Brownian motion?

Question 1 What are canal rays?

Calculate milli-moles and moles of a solute in 2000 mL solution which is 1 M.

Which amongst the following is the electron dot structure of H2 molecule?

Treatment of concentrated solution of borax with calculated quantity of sulphuric acid gives

Question 19 Is it possible for the atom of an element to have one electron, one proton and no neutron? If so, name the element.

The mass ratio of carbon to hydrogen in methane is 3:1. How much amount of hydrogen is required to react with 36 gms of carbon to form methane?

When heat is constantly supplied by a gas burner with a small flame to melt ice, then the temperature of ice during melting : (a) increases very slowly (b) does not increase at all (c) first remains constant and then increases (d) increases to form liquid water

Choose the type of fire which is caused due to acetylene.

Deuterium is an isotope of hydrogen and is represented by 21H. How many deuterium atoms are present in heavy water?

Which shell is occupied by the last electron of Neon?

The ionic compound containing Fe3+ and (SO4)2− would have the formula

How did scientists calculate the mass of particles coming out in a chemical reaction ?

The orbital with maximum energy is

What did Rutherford conclude regarding the atomic mass? (i) Mass of the atom is uniformly distributed. (ii) Nucleus of an atom is much heavier than electron. (iii) Nearly all the mass of an atom resides at the centre of an atom. (iv) Nucleus of an atom is lighter than the electron.

What form of ice should be taken to determine it's melting point?

What is a bulk phenomenon in terms of boiling

Question 82 (iii) In her Science class, Jyoti learned that the atomic weight of Helium is 4.0030; of Hydrogen is 1.0080; and of Oxygen is 16.0000. Find the difference between the atomic weights: Helium and Hydrogen.

Why is pumice stone placed usedin the beaker tofind the boiling point of water

Which one of the following molecule exists as tetra-atomic molecule?

What is the process to separate the mixture of ammonium chloride and sodium chloride ?

How will you separate common salt, sand and iron filings from their mixture?

What's is pauling's scale?

Name all the 118 elements in the periodic table with their symbol, atomic mass and atomic number.

You are suffering from fever. Which one will lower down your temperature ice or ice cold water. Explain

One of the following does not undergo sublimation. This one is: (a) iodine (b) sodium chloride (c) ammonium chloride (d) camphor

Milk of magnesia turns _________________.

Nowadays In a chemical reaction we write reactions then an arrow and then the products.we don't write reactants=products even after balancing.why? The mass of the reactants is not = to mass of the products.why?

On heating strongly, Lead (II) nitrate yields:

Is there is change of matter undergoing chemical cahnge

Sir how to find the chemical formula for potssium dichromate

Which of the following reactions does not liberate gaseous product ?

A set is a collection of ___ objects.

The given diagram represents the processes that take place when water changes states. The information in which alternative correctly matches the letters with their processes?

If the dispersed phase is liquid and the dispersion medium is solid, then the colloid is known as:

The radius of proton is 10-15 metre . Express it in Nanometre.